private Object getValue(Monitor<?> monitor, boolean reset) {
try {
if (limiter != null) {
final MonitorValueCallable c = new MonitorValueCallable(monitor);
return limiter.callWithTimeout(c, 1, TimeUnit.SECONDS, true);
} else {
return monitor.getValue();
}
} catch (UncheckedTimeoutException e) {
LOGGER.warn("timeout trying to get value for {}", monitor.getConfig());
} catch (Exception e) {
LOGGER.warn("failed to get value for " + monitor.getConfig(), e);
}
return null;
}
private static <T> T timeLimited(
T target, Class<T> clazz, Duration timeout, ExecutorService executor) {
TimeLimiter limiter = new SimpleTimeLimiter(executor);
return limiter.newProxy(target, clazz, timeout.toMillis(), MILLISECONDS);
}
private QueryResult executeQuery(
String url,
String username,
String password,
Query query,
String sql,
Duration timeout,
Map<String, String> sessionProperties) {
try (Connection connection = DriverManager.getConnection(url, username, password)) {
trySetConnectionProperties(query, connection);
for (Map.Entry<String, String> entry : sessionProperties.entrySet()) {
connection
.unwrap(PrestoConnection.class)
.setSessionProperty(entry.getKey(), entry.getValue());
}
long start = System.nanoTime();
try (Statement statement = connection.createStatement()) {
TimeLimiter limiter = new SimpleTimeLimiter();
Stopwatch stopwatch = Stopwatch.createStarted();
Statement limitedStatement =
limiter.newProxy(statement, Statement.class, timeout.toMillis(), TimeUnit.MILLISECONDS);
if (explainOnly) {
sql = "EXPLAIN " + sql;
}
try {
if (limitedStatement.execute(sql)) {
List<List<Object>> results =
limiter.callWithTimeout(
getResultSetConverter(limitedStatement.getResultSet()),
timeout.toMillis() - stopwatch.elapsed(TimeUnit.MILLISECONDS),
TimeUnit.MILLISECONDS,
true);
return new QueryResult(State.SUCCESS, null, nanosSince(start), results);
} else {
return new QueryResult(State.SUCCESS, null, nanosSince(start), null);
}
} catch (AssertionError e) {
if (e.getMessage().startsWith("unimplemented type:")) {
return new QueryResult(State.INVALID, null, null, ImmutableList.<List<Object>>of());
}
throw e;
} catch (SQLException | VerifierException e) {
throw e;
} catch (UncheckedTimeoutException e) {
return new QueryResult(State.TIMEOUT, null, null, ImmutableList.<List<Object>>of());
} catch (InterruptedException e) {
Thread.currentThread().interrupt();
throw Throwables.propagate(e);
} catch (Exception e) {
throw Throwables.propagate(e);
}
}
} catch (SQLException e) {
Exception exception = e;
if (("Error executing query".equals(e.getMessage())
|| "Error fetching results".equals(e.getMessage()))
&& (e.getCause() instanceof Exception)) {
exception = (Exception) e.getCause();
}
State state = isPrestoQueryInvalid(e) ? State.INVALID : State.FAILED;
return new QueryResult(state, exception, null, null);
} catch (VerifierException e) {
return new QueryResult(State.TOO_MANY_ROWS, e, null, null);
}
}